Ferroli ARENA 30 A Installation And Operating Instructions Manual page 38

Fault
Display and boiler off
Radiators cold in winter
Radiators hot in summer
Large variations in
domestic hot water
temperature
Low domestic hot water
flow
No domestic hot water
flow
No temperature increase
with boiler on
Loss of condensation from
the boiler
38
Possible cause
• Power failure
• Room thermostat
adjusted too low or
defective
• Room thermostat
adjusted too high or
defective
• Water flow rate too low
• Insufficient mains water
pressure
• Heat exchanger with
passages partially blocked
• Heat exchanger
blocked
• Defective flow-meter
• Boiler dirty
• Boiler insufficient
• Condensation discharge
blocked
ARENA 30 A
Solution
• Check or await the return of the
electrical power supply
• Adjust the knob to a higher
temperature, replace if
necessary
• Adjust the knob to a lower
temperature, replace if
necessary
• Increase the water flow rate
(minimum three litres per minute)
• Install a pressure increase
device
• Request the cleaning of the
heat exchanger
• Request Engineer for the cleaning
operations
• Request Engineer for the
replacement of the flow-meter
• Check and clean the boiler body
• Check that the boiler is the right
capacity for the requirements of
the heating system
• Check and clean the drain
trap